For Ceph version 0.55 and later, cephx authentication is on by default. Before mounting a Ceph File System in User Space (FUSE), ensure that the client host has a copy of the Ceph configuration file and a keyring with CAPS for the Ceph metadata server.
From your client host, copy the Ceph configuration file from the monitor host to the /etc/ceph directory.
sudo mkdir -p /etc/ceph
sudo scp {user}@{server-machine}:/etc/ceph/ceph.conf /etc/ceph/ceph.conf
From your client host, copy the Ceph keyring from the monitor host to to the /etc/ceph directory.
sudo scp {user}@{server-machine}:/etc/ceph/ceph.keyring /etc/ceph/ceph.keyring
Ensure that the Ceph configuration file and the keyring have appropriate permissions set on your client machine (e.g., chmod 644).
For additional details on cephx configuration, see CEPHX Config Reference.
To mount the Ceph file system as a FUSE, you may use the ceph-fuse command. For example:
sudo mkdir /home/usernname/cephfs
sudo ceph-fuse -m 192.168.0.1:6789 /home/username/cephfs
See ceph-fuse for additional details.